Keyboard capacitive backup

A method of controlling a computing device, comprising

• measuring with proximity logic at least one change in capacitance on a sense line of a keyboard, wherein the keyboard includes a transmit line selectively connectable to the sense line through a switch when the key is depressed;
• wherein the sense line is in communication with switch logic and the proximity logic;
• identifying the change as a capacitive characteristic indicative that the key is depressed;
• identifying that the switch logic, associated with the switch and configured to indicate that the key is depressed, failed to identify the key is depressed;
• and
• executing a command to indicate that the key is depressed in response to determining that the switch logic failed to identify the key is depressed.

A computer-program product for controlling a computing device, the computer-program product comprising a non-transitory computer-readable medium storing instructions executable by a processor to:

• measure with proximity logic at least one change in capacitance on a sense line of a keyboard, wherein the keyboard includes a transmit line selectively connectable to the sense line through a switch when the key is depressed;
• wherein the sense line is in communication with switch logic and the proximity logic;
• identify the at least one change as a capacitive characteristic indicative that the key is depressed;
• identifying that the switch logic associated with the switch and configured to indicate that the key is depressed failed to identify the key is depressed;
• and
• executing a command to indicate that the key is depressed in response to determining that the switch logic failed to identify the key is depressed.